8203221 has 16 divisors (see below), whose sum is σ = 13088320. Its totient is φ = 5047920.

The previous prime is 8203213. The next prime is 8203241. The reversal of 8203221 is 1223028.

It is a happy number.

It is not a de Polignac number, because 8203221 - 2³ = 8203213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8203194 and 8203203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8203241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11335 + ... + 12036.

It is an arithmetic number, because the mean of its divisors is an integer number (818020).

Almost surely, 2^8203221 is an apocalyptic number.

It is an amenable number.

8203221 is a deficient number, since it is larger than the sum of its proper divisors (4885099).

8203221 is a wasteful number, since it uses less digits than its factorization.

8203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23393 (or 23387 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 8203221 is about 2864.1265684323. The cubic root of 8203221 is about 201.6793674885.

Adding to 8203221 its reverse (1223028), we get a palindrome (9426249).

The spelling of 8203221 in words is "eight million, two hundred three thousand, two hundred twenty-one".